The self mixing concrete mixer is generally large in size, which is difficult to drive. It has a high center of gravity, is easy to roll over, and has a large load mass. When driving, the inertia is relatively large. When parking, whether on the flat ground or on the slope, the parking brake must be used. The parking brake is called handbrake for short. The use effect of handbrake will decline with the increase of use times. Sometimes During operation, I feel that the handbrake has been applied, but in fact, the failure or failure of the handbrake causes an accident. Therefore, the maintenance of the parking brake is also very important.

自拌水泥自动搅拌车的驻车制动系统是作用在后轮上，而因为后轮制动器的形式不同，驻车制动有两种工作环境：在安装鼓式制动器的后轮上，由于鼓式制动器本身就可以兼做驻车制动器，因此在驻车时刹车鼓内的蹄片和摩擦片相结合，这样就可以产生动力；而在安装蝶式制动器的后轮上，由于没有刹车鼓，因此就必须在刹车碟片的部位安装额外的驻车鼓来是驻车制动完成制动工作。准确的说，就是自拌水泥自动搅拌车的驻车制动系统的内部装有棘轮和棘爪，在将手刹拉起后，棘爪就会卡在棘轮上，使手刹自动锁紧，这也就是我们在拉紧手刹手柄的同时会听到“咔嗒”声响的原因。

The parking brake system of the self mixing concrete mixer works on the rear wheel. Because of the different forms of the rear wheel brake, there are two working environments for the parking brake: on the rear wheel with the drum brake installed, the drum brake itself can also act as the parking brake, so when parking, the shoes and friction plates in the brake drum are combined to generate power; when installing On the rear wheel with butterfly brake, since there is no brake drum, additional brake drum must be installed in the center of brake disc to complete the brake work. To be exact, the parking brake system of the self mixing concrete mixer is equipped with ratchet and pawl. After the hand brake is pulled up, the pawl will be stuck on the ratchet, making the hand brake lock automatically, which is the reason why we can hear "click" sound when tightening the hand brake handle.

自拌水泥自动搅拌车在手刹手柄的底部和铜缆的连接处有一个可调的补偿机构，使用扳手松开锁紧的螺帽，就可以拉伸刹车铜缆的长度，如果在检查中，我们发现手刹的制动效果或灵敏度不理想，就可以通过调节这个手刹操作铜缆来解决问题。手刹失灵造成事故的现象屡见不鲜，不仅仅是搅拌车，其它车辆，比如乘用车、随车吊、清障等等刹车失灵都容易造成事故，一定要经常检查自己爱车的手刹，发现问题，及时处理。

The self mixing concrete mixer has an adjustable compensation mechanism at the bottom of the handbrake handle and the connection of the copper cable. If the wrench is used to loosen the lock nut, the length of the brake copper cable can be stretched. If in the inspection, we find that the brake effect or sensitivity of the handbrake is not ideal, we can adjust the handbrake to operate the copper cable to solve the problem. It is not uncommon for the handbrake failure to cause accidents, not only for the mixer, but also for other vehicles, such as passenger cars, on-board cranes, obstacle clearance and so on. It is necessary to check the handbrake of your car frequently, find out the problems, and deal with them in time.

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